Analogues of Neuropeptide Y Containing β‐Aminocyclopropane Carboxylic Acids are the Shortest Linear Peptides That Are Selective for the Y1 Receptor

Unique, conformationally restricted β-amino acids are a constituent of truncated linear peptides such as 1, which have been obtained for the first time; these species show high and selective affinity toward the Y1 receptor. The high affinity of these ligands is dependent on the position and the configuration of this β-aminocyclopropane carboxylic acid.